Flowers and their Parts 



109 



parts neatly folded. The stamens are curved inward to bring 

 the anthers as near the centre as possible, and sepals and petals 

 are carefully wrapped around them. Sometimes petals and 



Fig. 118. — Convolute ajstivation o{ Ox alls (the sepals are imbricate). (From 

 Edmonds and Marloth's " Elementary Botany for South Africa.") 



sepals are valvate, that is, they just meet by their edges. If 

 they overlap, the aestivation is imbricate. In Hibisms and 



Fig. 119. — Imbricate aestiva- 

 tion of both sepals and 

 petals. (From Edmonds 

 and Marloth's " Elemen- 

 tary Eotany /or South 

 Africa.") 



Fig. 120. — Plumbago. 

 Stamens, honey 



glands, and pistil. 

 (From Henslow's 

 " South African 

 Flowering Plants.") 



Oxalis the petals so overlap that one edge of each is without 

 and one within another. They are twisted or convolute. In 

 Crasstila and Adenandra one is quite within the others and 



